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87bfb48f34
The current implementation to retrieve ACPI resources is faulty
and may cause issues that even can lead to non-booting systems.
When adding data from an ACPI device, the resources are already
assigned to the platform device. Therefore there is no need to
retrieve the resource list from ACPI and manually assign it to
the platform device. Also there shouldn't be any BIOS in the wild
anymore, that does not have resources added to the KEMPLD ACPI
data.
In particular this fixes an issue where the retrieval of the
resource list using /proc/ioports is disturbed and does not list
the assigned resource for the kempld device or even no resources
at all.
On some distributions this also leads to problems during system
initialization (e.g. with udev) and causes the system to not
boot at all.
I have reproduced the issue with the following kernel versions:
5.10.209
5.15.148
6.1.25
6.6.17
6.7.5
6.8-rc5
The patch applies to all of those versions and seems to resolve
the issue.
Signed-off-by: Michael Brunner <michael.brunner@kontron.com>
Link: https://lore.kernel.org/r/af8756be81c9062f9543d2e5d9373cf5e7877b1e.camel@kontron.com
Signed-off-by: Lee Jones <lee@kernel.org>
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.